Loom shuttle-bobbin



W. ROUTLEDGE.

Patented July 26, 1921.

WILLIAM ROUTLEDGE,

OF LONDON, ENGLAND.

LOOM SHUTTLE-BOBBIN.

Application filed July 6,

To all whom it may concern:

Be it known that I, WILLIAM RoU'rLnnoE, A. M. I. E. E., a subject of the King of Great Britain, residin at Laurel Bank, Hoop Lane, Golders G reen, London, England, have invented new and useful Improvements in Loom Shuttle-Bobbins, (for which I have applied for patent in Great Britain, June 23, 1919, Patent No. 151,360, and Dec. 18, 1919, Patent No. 160,278,) of which the following is a specification.

My invention relates to the bobbins of shuttles used in looms for weaving.

As is well known, such shuttle bobbins are usually made of a tapering wooden cyliuder, the outer periphery of which is generally formed with a series of annular or spiral grooves for the purpose of preventing the weft unintentionally leaving the said cylinder due to the impacts which the shuttle receives in its motion in the loom. Such bobbins frequently become broken in use and their replacement is a constant source of expense which, particularly at the present time, is a matter of some importance.

Attempts have been made to substitute for such wooden bobbins, bobbins made from a sheet of metal, preferably tin-plate, which is wound spirally so as to form a taper tube of the dimensions required and provided with spiral grooves, projections or the equivalent thereof.

According to my invention the adjacent edges of the spirally wound strip are seamed or locked to one another so as to form, without the use of solder, cement'or the like, a rigid tube provided with a spiral projection.

To enable the invention to be fully understood, I will describe it by reference to the accompanying drawing, in which-- Figure 1 is a sectional side view of a bobbin having one form of seam or locked joint according to the invention.

Figs. 2, 3, 4, 5 and 6 are sectional views illustrating other forms joint.

Referring to Fig. 1, (5 indicates the strip which is spirally wound so as to form the tapering tube. The edges of the strip which is thus spirally wound are formed into a Specification of Letters Patent.

of seam or locked Patented July 26', 1921. 1920. Serial No. 394,278.

seam b which constitutes the projecting spiral required.

Fig. 2 is a view similar to Fig. l but illustrating a slight variation in this type of seam, and Fig. 3 is a view illustrating the construction in which the seam is formed by a spiral clip piece 0 which engages the flanged adjacent edges '(Z of the spiral strip a in the manner clearly indicatec Fig. 4 shows a construction in which the seamed or locked joint is formed by overlapping the adjacent edges of the spirally wound strip of metal and then forming a groove 6 therein exterior to the bobbin whereby the said edges are locked together and the necessary spiral groove is provided for the bobbin. The groove 6 is shown of semicircular form in cross section.

Fig. 5 shows a similar construction to Fig. 4 but showing the groove 6 formed in the interior of the bobbin whereby the spiral projection f is produced on the exterior thereof.

Fig. '6 shows a similar view to Fig. 5, the groove 6 being, however, of V-form in cross section.

lVhat I claim and ters Patent is 1. A loom shuttle bobbin composed of a strip of metal spirally wound to form a taper tube, the adjacent edges of the spirally wound strip being in interlocking engagement with one another in such a manner as to form a rigid tube provided with a spiral projection, substantially as set forth.

2. A loom shuttle bobbin composed of a strip of metal spirally wound to form a taper tube, the adjacent edges of said strip being bent to form a spiral projection.

3. A loom shuttle bobbin composed of a strip of metal spirally wound to form a taper tube, the adjacent edges of said strip being hook-shaped in cross sections, said hook-shaped portions being adapted to interlock.

4. A loom shuttle bobbin composed of a strip of metal spirally wound to form a taper tube, the adjacent edges of said strip being bent to form projections, and means for securing the pro ectlng parts together. WILLIAM ROUTLEDGE.

desire to secure by Let- 

